2011903 has 2 divisors, whose sum is σ = 2011904. Its totient is φ = 2011902.

The previous prime is 2011897. The next prime is 2011907. The reversal of 2011903 is 3091102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011903 - 2⁹ = 2011391 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005951 + 1005952.

It is an arithmetic number, because the mean of its divisors is an integer number (1005952).

2^2011903 is an apocalyptic number.

2011903 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011903 is an equidigital number, since it uses as much as digits as its factorization.

2011903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 2011903 is about 1418.4156654521. The cubic root of 2011903 is about 126.2415581063.

The spelling of 2011903 in words is "two million, eleven thousand, nine hundred three".